【摘要】 文章实验采用产酸相中温产甲烷相高温两相发酵工艺,逐步提高系统中有机负荷,以此研究产甲烷相中氨氮浓度的变化规律及其影响。结果表明:氨氮浓度随有机负荷的提高而增大,当有机负荷提高到7.3 g VS·L-1d-1时,氨氮浓度上升到5386 mg·L-1,容积产气率最高达4.1 L·L-1d-1,系统运行良好;当有机负荷达到7.7 g VS·L-1d-1时,氨氮浓度达到6144 mg·L-1,系统出现氨氮抑制;抑制解除后,系统可在有机负荷为3.4 g VS·L-1d-1,氨氮浓度为4586 mg·L-1的条件下稳定运行,容积产气率达到2.5 L·L-1d-1。实验结果还显示:在高浓度氨氮条件下可强化乙酸的代谢,但对丙酸和丁酸的效果不明显。更多还原

【Abstract】 In this experiment,a bench scale two-phase anaerobic digestion( with acidogenic reactor of 4. 5 L and the methanogenic reactor of 5 L) at high temperature( 55℃) was used to study the variations of ammonia concentration in the methanogenic reactor under condition of increasing organic loading rate( OLR) gradually. The results showed that: when OLR was 7. 3 g VS·L- 1d- 1,the ammonia concentration was 5386 mg·L- 1,and the volumetric gas production rate was 4. 1L·L- 1d- 1. Continue to increase OLR to 7. 7 g VS·L- 1d- 1,ammonia nitrogen concentration reached 6144 mg·L- 1,the daily gas production began to decline. When ammonia inhibition occurred in the system,by adding water and stopping feeding,the ammonia concentration decreased to 3822 mg·L- 1. After the disinhibition,the system could operate stably under OLR of 3. 4 g VS·L- 1d- 1with the ammonia nitrogen concentration of 4586 mg·L- 1and the volumetric gas production rate was 2. 5 L·L- 1d- 1. The system recovered well.更多还原